Norsal was built in 1931 in Vancouver for Powell River Co. Ltd. by W.R. Menchions with a Fairbanks-Morse Co Ltd. Engine. She was requisitioned 1939-1945 and used as a patrol boat.
There is correspondence regarding the requisition of the vessel for the Second World War between TM Stephen, AA Stephens and TH Evans. The reports in the file are: general condition of hull, general condition of machinery, port engine cylinder liner, and Reconditioning and repairs necessary upon turning back to owners from Naval Service.

Series consists of records relating to the correspondence between members of the Steamship Inspectors Office including the Chairman, Senior Steamship Inspectors and Steamship Inspectors, amongst others regarding inspections done before and after the requisition of vessels for the second world war. There is also additional correspondence, including with the owners of the vessels.